Steam-drier



Patented Sept. 20, H898.

'me Nnims Firms co. PHOTO-mwa, WASHINGTON, u c

IrnD S'ATns PATENT Frio.

HAROLD r. Dran, OF CLEVELAND, OHIO.

STEAM-Dalen.

SPECIFICATION forming part of Letters Patent No. 610,962, aerea september 2o, 189s. Application tiled January 24., 1898. Serial No. 667,743. (No model.)

ing is a specification.

My invention relates to steam-drying machines which are cylindrical in form, but more especially to that class of driers which are employed to expel moisture from granular materials, such as sugar, and which consist of a hollow revolving cylinder provided with steam-tubes placed in a circle inside of the shell, with their axes parallel with the axis of the cylinder. This is the preferred form of driers; but I do not wish to confine myself to this particular construction, as it is evident that my invention is applicable to any approximately horizontal cylinder which has a steam-space adjacent to its periphery.

The object of my invention is to procure a thorough drainage of the water of condensation from the steam-spaces in order that a maximum of efficiency may be realized from the heating-surfaces.

A further object is to admit the steam pri- Inarily to the end of the cylinder at which the material to be dried enters, thus bringing the damp material into contact with the hottest part of the machine first.

I attain these objects in the manner which I will now proceed to describe, reference being had to the accompanying drawings, in which- Figure l is a side view of the machine with portions at each end broken away to a central section. Fig. 2 is an elevation of the outside of the rear head. Fig. is a View ot' the outside end of the water-box.

The letter A represents the cylinder, which is usually set with the rear end somewhat lower than the other in order to facilitate the passage of the material through the same and is supported by and revolves upon suitable rollers B and C near each end. A pinion D, engaging with a spur-gear ring E, fixed to the front head of the cylinder, is the driving mechanism. The front head F is a hollow ring provided with apertures for the steamtubes G anda flange to which the shell is attached. The rear head II is somewhat smaller in diameter than the inside of the cyl inder, to which it is fastened by means of lugs h, and consists of a hollow annular rim divided into compartments, with which the tubes G communicate. Each of these compartments is connected through the hollow arms I with the central hub of the head, as plainly shown in Fig. 2. Openings J in the rear side of the inner end of each arm communicate with apertures K in the water-box L, which is attached with a steam-tight joint to the nave of the head and carries on its outer face a hanger and stuiing-boir M for the drain-pipe N.

Steam enters through the pipe O, which follows the axis of the cylinder and connects with the small chamber a in the hub of the rear head, from which it is conducted through the branch pipes h, placed in the hollow arms I, and the pipes @extending through the tubes G to the front head F, from whence the tubes G are supplied.

The material to be dried is fed into the cylinder through the front head F, thus absorbing heat from the hottest portion of the tubes, and graduallytraveling toward the lower end it parts with its moisture and finally passes between the rear head H and the shell and flows out into a suitable receptacle P. As steam condenses inthe tubes G the water of condensation iiows down into the compartments in the annular portion of the head H, and as the cylinder revolves in the direction of the arrow the Water collects at the lower end of the compartment, and when the cylinder has traveled about a quarter of a revolution the water flows by gravity through the curved hollow arms I toward the center and overflows through the openings .I and K into the water-box L. The stationary drainpipe N extends downwardly at n, so that its opening is constantly under water and thereby hermetically sealed against the escape of steam, while the Water is forced out by the pressure on its surface. By this arrangement of drainage the tubes and steam-spaces are kept entirely free from Water Without any waste of steam.

IOO

Having thus described myinvention, what p I claim as new, and desire to secure byLetters Patent, is-a- 1. In a steam-drying cylinder, the combi nation with the front head and a steam-supply therefor, of the rear head H, consisting of a hollow annular rim divided into compartments, steam-tubes connecting said compartments to the front head, hollow arms and apertures connecting the rear head with a drum-shaped Water-box attached to its hub, substantially as set forth.

2. The combination in a cylindrical steamdrier with the front head and a steam-supply therefor, of the hollow rear head I'Lthe Waterbox L, attached to and communicating with the arms and compartments of the rear head, the hanger and stuffing-box M, iixed to the Water-box,and the drain-pipeN,With its down- Ward projection n, in the Water-box, substantially as set forth.

3. The combination of the steam-pipe O, placed axially in the cylinder and communieating with the chamber a, in the hub of the rear head, with the branch pipes b, connecting with the chamber ct, and passing through the hollow arms of the rear head,and the pipes c, within the tubes or steam-spaces of the cylinder, opening into the front head F, substantially as described.

4. The self-draining head H, consisting of a hollowr annular rim divided into compartments communicating With the steam tubes or spaces of the cylinder, and connected by hollow arms and apertures with a drumshaped Water-box attached to its hub, substantially as set forth.

In testimony whereof I affix my signature, in the presence of tWo Witnesses, at Cleveland, Ohio, January 19, 1898.

HAROLD P. DYER.

Witnesses:

G. D. STURTEVANT, JNo. F. DELL. 

